This episode explores the past and present of horses, from their central role in ancient empires and industrial America to their modern status as high-value sport animals in disciplines like dressage. Economist-equestrians and historians explain how horses evolved from "living machines" that powered cities to luxury goods shaped by opaque markets, billionaires, and specialized breeding. The host then visits a New Jersey dressage barn to see training up close and even rides a high-level sport horse himself to experience the human-horse partnership.